Exports - Object Bleedthrus

Using Genesis, specifically either The Girl or Victoria 5, while in DAZ and adding clothes and/or accessories everything looks good. However, after exporting to FBX (with merge clothing turned on), then importing said FBX into iClone, the clothes rarely ever fit the base model as expected. Specifically around the breast area. Is there anything I can do to get these things to look good or right upon export?